Traction-engine



(N0 MOdl.) N J 87; 2 s heets shee z 1..

TRACTION ENGINE. v N0. 807,771. Patented Nov; 11, 1884.

(No Model.) 2 SheetsSheet 2.

N., J. J. & E. JOHNSON.

TRAGTIONENGINE.

No. 307,771. Patented Nov. 11,1884.

UNrrieio S'ra'rns FarnNr Orrrcs,

NELL JOHNSON, JOHN J. JOHNSON, AND EDWARD JOHNSON, OF NASHOTAH, WISCONSIN.

TRACTlON -ENGINE.

UPECIFECATION forming part of Letters Patent P30301771, dated November 11, 1884.

Application filed February 28, 1884. No model.)

T 0 aZZ whom it may concern.-

Be it known that we, NnLL J OHNsON, JOHN J. J OHNSON, and EDWARD J oHNsoN, citizens of the United States, residing at Nashotah, in the county of Vaukesha and State of W'isconsin, have invented certain new and useful Improvements in Portable Steam-Engines; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which itappcrtains to make and use the same, reference being had to the accompanying drawings, and to letters Or figures of reference marked thereon, which form a part of this specification.

Our invention relates to improvements in portable steam-engines, and pertains to the devices and their adjustment for communicating motion from the crank-shaft to the traction-wheels, whereby the engine may be pro polled from place to place by the application of steam-power.

Our invention is further explained by reference to the accompanying drawings, in which Figure 1 represents a side view. Fig. 2 is a vertical section drawn on line 00 x of Fig. 1. Figs. 3, 4, and 5 are details.

Like parts are represented by the same reference-letters throughout the several views.

The boiler A, engine 13, crank-shaft G, flywheel D, traction-wheels E E and F F, and axles G and H are all constructed and arranged in the ordinary manner.

To the side of the boiler A, and immediately in front of the combustionchamber, are attached the heavy iron brackets I I, upon which the journal-boxes J J are supported. The brackets I I are adapted to be secured to any boiler by screw-bolts fitting into screw-cut holes formed therefor through the sides of the boiler, and all the parts are so constructed as to be easily attached to the various forms of portable engines and boilers now in use, as well as to be applied to new work in the process of construction.

To the inside of the two rear wheels, E E, is clamped or otherwise secured the sprocketwheel K, to which motion is communicated from the crank-shaft O through the sprocketwheel L, sprocket-chain M, sprocket-wheel N, shaft O, sprocket-wheel P, and sprocket'chain Q. The journal-boxes J are attached to the brackets I by bolts R R, which pass down through the slots S, having heads beneath the lower surface of such brackets. The slots S permit the journal-boxes to be moved toward the right or left, as may be required, to give the required tension to the sprocket-chains, and when properly adjusted are rigidly held in place by tightening the nuts on the bolts R R.

The sprocket-wheels P P, one of which is shown in detail in Figs. 3 and 4, consist, respectively, in thedisks or flanges T T, which are rigidly keyed to the shaft O and the annulus U, having sprocket-teeth V and inwardprojecting ratchet-teeth a. The annulus U is supported upon and held in place by the disks T T, around which it is adapted to revolve, either with or independently of said disks. When, however, the disks TTare turned forward in the direction indicated by the arrow, the ratchet-teeth a engage one or both of the pawls b 1), whereby motion is communicated from the shaft 0 through the pawls b b and disks T T to the annulus U, and from thence through the sprocket-chain Q to the sprocketwheels K and the traction-wheels, as mentioned. It is obvious that by thus connecting the sproeket-wheel by the pawls and ratchet to the shaft we are enabled to draw the vehicle forward by external appliances without moving the engine, as the annulus U is free to turn around the shaft O and disks T T without communicating any motion to the chain M or engine. It is also Obvious that when turning a corner or describing a circle the outside traction-wheel is free to revolve as much faster than the inside traction-wheel as may be required by the additional space over which it travels, as the annulus with its ratchet-teeth 0 will be free to move forward over the pawls b 1) without communicating motion to the disks T or shaft 0. Vhen desirous to communicate a backward movement to the vehicle by the action of the engine, it becomes necessary to so connect the annulus U with the disks T T that they will both rotate backward together. This end is accomplished by inserting a bolt or key, A, through the hole A, formed through the annulus U and disks T T, whereby it is obvious that as the annulus is rotated backward in the opposite direction to that indicated by the arrow (which is done by reversing the engine) said shaft 0 and disks T. T will carry with them the annulus U, whereby a reverse movement will be communicated being adaptedto communicate a forward movement to the rear traction-wheels as they are rotated forward, and to permit said rear traction-wheels to move forward when drawn with- 7 IO Patent, is-

2o with the respective ends of shaft 0, interposed out moving the engine, substantially as and for the purpose specified.

3. The combination of shaft 0, disks '1 T, rigidly keyed on said shaft, annulus U, adapted to revolve both with and independently of said disks, with the pin or key 'A, adapted to be inserted through key-hole A, provided therefor through said annulus and disks, whereby said disks and annulus are looked together, substantially as and for the purpose specified.

In testimony whereof we affix our signatures in presence of two witnesses.

NELL JOHNSON. JOHN J. JOHNSON. EDWARD JOHNSON. Witnesses as to Nell Johnson:

G. T. BENEDICT, JAS. B. ERWIN.

Witnesses as to John J. Johnson and Edward Johnson:

H. G. HATl-IAWAY, FRED B. BROWN.

1. In a traction-engine, the combination, with the sides of the boiler, of the supportingbrackets I I, rigidly affixed to the sides of the boiler, said brackets having slots S S, the ad- 15 justable j ournal-bearings J J, bolts and nuts R R, the shaft 0, and the mechanism driven thereby, substantially as and for the purpose set forth.

2. In a traction-engine, the combination,

between and connected by chains and gears with the crank-shaft of the engine and the shaft or axle of the traction-wheels, of the sprocketwheels P, consisting, respectively, in the disks 25 '1 T, keyed rigidly to the supporting-shaft O, pawls b, and annulus U, having sprocket-teeth V and ratchet-teeth a a, said sprocket-wheels 

